Form 4 for CRBU Caribou Biosciences, Inc.
Accepted 2026-02-20 00:00:00 ET · period of report 2026-02-20 · accession 0001762893-26-000002 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-02-20 | 2026-02-20 | CRBU | Ryali Sriram | CFO | A - Grant | $0.00 | +55.0K | 72.4K | +317% | $0 |
| D | 2026-02-20 | 2026-02-20 | CRBU | Ryali Sriram | CFO | A - Grant | $0.00 | +247.5K | 247.5K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-02-20 | A | A | 55,000 | $0.00 | 72,360 | D | — | — | (F1) This reflects restricted stock units ("RSUs") that vest in four equal annual installments beginning on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through the applicable vesting dates. The RSUs will be settled in stock within 30 days after each vesting date. |
| 2 | Derivative | Option to purchase Common Stock | 2026-02-20 | A | A | 247,500 | $0.00 | 247,500 | D | $1.80 · — to 2036-02-19 | 247,500 Common Stock | (F2) 1/48 of the total number of shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2030, subject to the reporting person continuing to provide service to the Issuer through each such vesting date. |